Definition
To become extremely quiet or to speak very softly, almost inaudibly.
謂聲音變得极低
His voice sank to a whisper when he heard the bad news.
當他聽到壞消息時，他的聲音低沈到幾乎聽不見。
In the library, everyone's voices sank to a whisper.
在圖書館裡，每個人的聲音都變得非常輕微。
Her voice sinks to a whisper when she feels embarrassed.
當她感到尷尬時，她的聲音會低沈到幾乎聽不見。